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Describe additional guarantee #2448

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Mar 7, 2024
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Describe additional guarantee #2448

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Describe additional guarantee
CyberROFL Mar 5, 2024
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Suggestion from @blinkov
CyberROFL Mar 5, 2024
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1 change: 1 addition & 0 deletions ydb/docs/en/core/concepts/cdc.md
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Expand Up @@ -9,6 +9,7 @@ When adding, updating, or deleting a table row, CDC generates a change record by
* Change records are sharded across topic partitions by primary key.
* Each change is only delivered once (exactly-once delivery).
* Changes by the same primary key are delivered to the same topic partition in the order they took place in the table.
* Change record is delivered to the topic partition only after the corresponding transaction in the table has been committed.

## Limitations {#restrictions}

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3 changes: 2 additions & 1 deletion ydb/docs/ru/core/concepts/cdc.md
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Expand Up @@ -6,9 +6,10 @@ Change Data Capture (CDC) обеспечивает захват изменени

## Гарантии {#guarantees}

* Записи об изменении шардированы между партициями топика по первичному ключу.
* Записи об изменениях шардированы между партициями топика по первичному ключу.
* Каждое изменение доставляется ровно один раз (exactly-once семантика).
* Изменения по одному и тому же первичному ключу доставляются в том же порядке, в котором они происходили в таблице в одну и ту же партицию топика.
* Запись об изменении доставляется до партиции топика только после фиксации (коммита) соответствующей транзакции в таблице.

## Ограничения {#restrictions}

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